HID: usbhid: use generic hidinput_input_event()

HID core provides the same functionality as we do, so drop the custom
hidinput_input_event() handler.

Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c
index 62b5131..8c32357 100644 (file)
--- a/drivers/hid/usbhid/hid-core.c
+++ b/drivers/hid/usbhid/hid-core.c
@@ -649,72 +649,6 @@ static void usbhid_submit_report(struct hid_device *hid, struct hid_report *repo
        spin_unlock_irqrestore(&usbhid->lock, flags);
 }
 
-/* Workqueue routine to send requests to change LEDs */
-static void hid_led(struct work_struct *work)
-{
-       struct usbhid_device *usbhid =
-               container_of(work, struct usbhid_device, led_work);
-       struct hid_device *hid = usbhid->hid;
-       struct hid_field *field;
-       unsigned long flags;
-
-       field = hidinput_get_led_field(hid);
-       if (!field) {
-               hid_warn(hid, "LED event field not found\n");
-               return;
-       }
-
-       /*
-        * field->report is accessed unlocked regarding HID core. So there might
-        * be another incoming SET-LED request from user-space, which changes
-        * the LED state while we assemble our outgoing buffer. However, this
-        * doesn't matter as hid_output_report() correctly converts it into a
-        * boolean value no matter what information is currently set on the LED
-        * field (even garbage). So the remote device will always get a valid
-        * request.
-        * And in case we send a wrong value, a next hid_led() worker is spawned
-        * for every SET-LED request so the following hid_led() worker will send
-        * the correct value, guaranteed!
-        */
-
-       spin_lock_irqsave(&usbhid->lock, flags);
-       if (!test_bit(HID_DISCONNECTED, &usbhid->iofl)) {
-               usbhid->ledcount = hidinput_count_leds(hid);
-               hid_dbg(usbhid->hid, "New ledcount = %u\n", usbhid->ledcount);
-               __usbhid_submit_report(hid, field->report, USB_DIR_OUT);
-       }
-       spin_unlock_irqrestore(&usbhid->lock, flags);
-}
-
-static int usb_hidinput_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
-{
-       struct hid_device *hid = input_get_drvdata(dev);
-       struct usbhid_device *usbhid = hid->driver_data;
-       struct hid_field *field;
-       int offset;
-
-       if (type == EV_FF)
-               return input_ff_event(dev, type, code, value);
-
-       if (type != EV_LED)
-               return -1;
-
-       if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
-               hid_warn(dev, "event field not found\n");
-               return -1;
-       }
-
-       hid_set_field(field, offset, value);
-
-       /*
-        * Defer performing requested LED action.
-        * This is more likely gather all LED changes into a single URB.
-        */
-       schedule_work(&usbhid->led_work);
-
-       return 0;
-}
-
 static int usbhid_wait_io(struct hid_device *hid)
 {
        struct usbhid_device *usbhid = hid->driver_data;
@@ -1283,7 +1217,6 @@ static struct hid_ll_driver usb_hid_driver = {
        .open = usbhid_open,
        .close = usbhid_close,
        .power = usbhid_power,
-       .hidinput_input_event = usb_hidinput_input_event,
        .request = usbhid_request,
        .wait = usbhid_wait_io,
        .idle = usbhid_idle,
@@ -1377,8 +1310,6 @@ static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *
        setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid);
        spin_lock_init(&usbhid->lock);
 
-       INIT_WORK(&usbhid->led_work, hid_led);
-
        ret = hid_add_device(hid);
        if (ret) {
                if (ret != -ENODEV)
@@ -1411,7 +1342,6 @@ static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid)
 {
        del_timer_sync(&usbhid->io_retry);
        cancel_work_sync(&usbhid->reset_work);
-       cancel_work_sync(&usbhid->led_work);
 }
 
 static void hid_cease_io(struct usbhid_device *usbhid)
@@ -1531,15 +1461,17 @@ static int hid_suspend(struct usb_interface *intf, pm_message_t message)
        struct usbhid_device *usbhid = hid->driver_data;
        int status = 0;
        bool driver_suspended = false;
+       unsigned int ledcount;
 
        if (PMSG_IS_AUTO(message)) {
+               ledcount = hidinput_count_leds(hid);
                spin_lock_irq(&usbhid->lock);   /* Sync with error handler */
                if (!test_bit(HID_RESET_PENDING, &usbhid->iofl)
                    && !test_bit(HID_CLEAR_HALT, &usbhid->iofl)
                    && !test_bit(HID_OUT_RUNNING, &usbhid->iofl)
                    && !test_bit(HID_CTRL_RUNNING, &usbhid->iofl)
                    && !test_bit(HID_KEYS_PRESSED, &usbhid->iofl)
-                   && (!usbhid->ledcount || ignoreled))
+                   && (!ledcount || ignoreled))
                {
                        set_bit(HID_SUSPENDED, &usbhid->iofl);
                        spin_unlock_irq(&usbhid->lock);

diff --git a/drivers/hid/usbhid/usbhid.h b/drivers/hid/usbhid/usbhid.h
index dbb6af6..f633c24 100644 (file)
--- a/drivers/hid/usbhid/usbhid.h
+++ b/drivers/hid/usbhid/usbhid.h
@@ -92,9 +92,6 @@ struct usbhid_device {
        unsigned int retry_delay;                                       /* Delay length in ms */
        struct work_struct reset_work;                                  /* Task context for resets */
        wait_queue_head_t wait;                                         /* For sleeping */
-       int ledcount;                                                   /* counting the number of active leds */
-
-       struct work_struct led_work;                                    /* Task context for setting LEDs */
 };
 
 #define        hid_to_usb_dev(hid_dev) \